Life is full of unknowns. I try my best to get to know Jesus, and the more I get to know about Him, the more I realize how little I know. I've been married to my hubs for over forty years and I swear, he changes everyday. Sure, I know what he likes to eat, but then he goes and orders something off the menu that completely throws me.
It is the same with ourself. We don't really know ourself. We don't know what we are capable of until we are stretched, challenged, sick, tired, in love, or full of hate. Depending on what's in us, and what we are in to, determines how we behave or react. So, since it is difficult at least, and impossible at best to know ourself, how can we know anyone else. We can't. So, instead of saying, "I can't", try saying, "I will try." Like that tea bag we don't know what's in us, until we are in hot water.