Tyler Perry does a great job of describing the different levels of friendship. He uses the example of a tree...and, before I even start, let me say he does this MUCH better than I! <lol>
In our lives we will have many acquaintances, like leaves on a tree. They come and go...they are flimsy...they might provide shade when we need it, but they aren't permanent in our lives. Then there are branches. You might think they are sturdy and strong...but step out too far and BOOM! They'll break and you'll fall. Never, ever mistake a branch for being more than they are...they are great, they stick around for quite a while, but when you need them most, they just might let you down. Finally, there are roots. These are the people that will NEVER leave us, NEVER let us down. They are ALWAYS there for us. We might only have two or three roots in our entire lifetime, but we have to hold on to these people...they are who we need to keep around us. And remember, the biggest trees don't need a lot of roots...they just need to run DEEP to keep the tree upright.
I'm 31 and I can tell you I have ONE ROOT, for certain. I have lots of branches and tons of leaves, but only one root. I'm thankful for that person, I give thanks to Jesus for her every day. And even if I go my whole life with only that one root, I'll be fine...because she'll always be there to support me (and me, her). Trust me, if you have a true friendship, a true "root", you'll know the difference...you won't have to ask.
