"For He shall give His angels charge over thee, to keep thee in all thy ways. They shall bear thee up in their hands, lest thou dash thy foot against a stone." (Psalm 91:11)
Have you ever felt borne by angels? Can't say I have. At least not consciously. I'm sure it's happened many a time but I suppose I was just paying attention to something else at the time. Before we get into this, I feel I need to cite something very important. It's this scripture from Paul's epistle to the Colossians (2:18):
"Let no man beguile you of your reward in a voluntary humility and worshipping of angels, intruding into those things he hath not seen, vainly puffed up by his fleshly mind."
See! See right there. It says "those things he hath not seen". So unless you've seen it, don't start talking about it. I don't know if this is hypocritical or not. I think I'll just couch my parlance in the purely subjective. I shall lead with "I believe" in each instance. Because except for two dreams (only one of which did they actually look like angels), I haven't actually seen them with my eyeballs.
Before we begin, look how the devil even seeks to use the top scripture against Jesus. He skews it a bit (as he's wont to do) when he tells Jesus during His temptation in the wilderness to "cast Thyself down: for it is written, He shall give His angels charge concerning thee: and in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone." (Matthew 4:6) Skewed because nowhere in the Bible do I find suicide an acceptable act to invoke God's intervention but also because he's an angel for God's sake. Well, maybe not for God's sake anymore. You get the idea.
The high cost of paying attention
"He that dwelleth in the secret place of the most High shall abide under the shadow of the Almighty." (Psalm 91:1)
God is not an angel. Nor are we at any time here or hereafter. When Jesus says with reference to marriage that people are "as the angels of God in Heaven." (Matthew 22:30), He's talking about attaining a higher state of being. Nothing to be concerned about unless God has called you to see it, as was Paul. I'd wager to say that Paul spent enough time in the gutter for God's sake to be able to speak of the things he did. Things like angels and NDEs (Near Death Experiences) and healing and tongues. Notice his admonition to the Corinthians regarding the "tongues of angels". He says if he has no love, he is "nothing" (see 1 Corinthians 13). And this is what we're getting at. It's very tempting to take the idea, really the reality, of a spiritual realm and fantasize up and down about how things are, in spite of not knowing what we're talking or thinking about. Because it's all about God. It's not hard to think about angels helping and directing and protecting. It's there in the Bible! How hard can it be? Never drive faster than your angel can fly, I might add. But the hard stuff? It's directing our attention to God in whatever way we're inclined--out of love. That's what tells. That's the only thing worth expending the energy with which we're gifted. To God's face. And He's higher than any angel that ever was. Or will be.
"Who maketh His angels spirits; his ministers a flame of fire." (Psalm 104:4)
Have you ever been somewhere and taken notice of the light? After you'd been in the ambiance long enough to have both become desensitized and also to have noticed anything untoward? Of course, it all depends on what you're doing and what God's showing you at the time, but I believe angels manifest themselves in small ways. Like light. The glow might increase a fraction or so. Just enough for God to get your attention. It could very well be a spike in power or some other perfectly rationalized explanation for why it just got brighter (not an angel, Lord no) but they'd have to find some means of ingressing into this plane, right?
Angels in the details
"Because he (and she) hath set his love upon me, therefore will I deliver him: I will set him on high because he hath known my name. He shall call upon me, and I will answer him: I will be with him in trouble; I will deliver him, and honour him. With long life will I satisfy him, and shew him my salvation." (Psalm 91:14-16)
There's no doubt God uses angels. Just be careful you don't grant them more attention than they're due. God did all He did for you, not them. I don't mean to be rude, but angels know what they're here for. They're made to carry out God's will and if you want to walk in that, you'll be on the side of the angels and if your paths cross to where you get to interact with them, it'll probably be something you couldn't bandy about to the world at large. The idea that there are angels out there who are still angels in spite of being on another side (to put it politely) is enough to make one shudder and to keep one's mouth shut. The whole reason why Lucifer became what he did is because he refused to accept and be content with the fact that he wasn't the highest.
"How art thou fallen from heaven, O Lucifer son of the morning! how art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend into Heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north." (Isaiah 14:12-13)
I would say that the more you notice the little things, the more God can show you more. If you make a point to work your way up, so to speak, sharing all of the tiniest things your mind and heart alight upon, the more you'll be in tune to see an angel. Let alone know what to do after it happens. These things fade. We forget. We carry on. And whether or not we get to be picked up prior to kicking a rock (or the bucket), we must know, know, that Jesus is carrying us at all times.