"That ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God; Strengthened with all might, according to His glorious power, unto all patience and longsuffering with joyfulness." (Colossians 1:10-11)
I suppose that could be the biggest and tryingest test of patience and fortitude we face. Er, reworded a tad, it takes all the strength and power of God to remain patient. I'm not talking about the easily faked and readily available, garden variety tolerance we feel like showing to those we encounter we don't otherwise know. I'm talking about the forty days in the desert fast type of patience. I'm talking about the kind of patience and longsuffering that is Spirit infused while you wait for someone to change their thinking to be more in line with--not your denomination--but the Lord. Something akin to "travail[ing] in birth again until Christ be formed" (Galatians 4:19). Formed in those who may or may not be born again but who certainly aren't acting in concert with Him. This is a very special calling. To where God won't let you rest until you see to it that the people in question are presented before God in prayer and intercession. Forgiving the attitudes and sins to which only you may be privy. And it's one thing to do it for a time. But I can guarantee you your strength will falter and fail before any tinge of "longsuffering" enters into the thing. And "joyfulness" can only come from God. These are the things that make for a "walk" that is "worthy of the Lord".
"He giveth power to the faint; and to them that have no might He increaseth strength." (Isaiah 40:29)
There are people on this world, walking around and acting normal--who are broken inside. They know it. And no one else but God does. If God brings you in and among those who fit this description, know that it's a high honor to lift them up to the Lord. God won't have you be in their vicinity forever. But the time you spend with or near them is enough to direct the simple prayers of blessing and fruitfulness and healing toward God before He sends either you or they on their way. Enough to nudge them on the path God has for them.
"O God, Thou art terrible out of Thy holy places: the God of Israel is He that giveth strength and power unto His people." (Psalm 68:35)