Philippians 4:13 is a very popular scripture that is often quoted out of context. It says, "I can do all things through Christ who strengthens me." That doesn't mean we can just do anything we decide to do because we want to do it. Paul was talking specifically about how he was able, through the power of Christ, to be content no matter what his circumstances were. 

I do believe that, by God's grace, we can do whatever we need to do in life. I think that's a mindset we need to have. There's nothing that's too much for us if we're trusting God. We can handle whatever comes our way because God promises that He'll never put more on us than we can bear and deal with. 

So keep a positive attitude no matter where we are right now, no matter what's going on in our life. Cheer up, God is on our side. Stop being upset about things we can't do anything about. 

God wants us to know that He has an individual plan for our life, and He wants us to accept His unique plan for us and not compare our plan with anybody else's. We have to trust God, who knows more about what we need and what we can handle than we do. After all, He knows us better than we know ourself! 

I have strength for all things in Christ Who empowers me [I am ready for anything and equal to anything through Him Who infuses inner strength into me; I am self-sufficient in Christ’s sufficiency]. (Philippians 4:13 AMP)