Strength is the ability to stand up for what you believe in. It means that you keep on pushing, even when you want to give up.
For some people, strength is putting on a happy face for their children, even when they feel terrible inside. Sometimes, strength is getting out of bed in the morning. Sometimes strength is saying something to another person, to share a kind word even if you have been mistreated.
Strength can appear in many ways, and the best method to get more strength in our lives is by turning to God. He can give us the added measure of strength and courage that we cannot achieve on our own.
Psalm 31:24 Be of good courage, and he shall strengthen your heart, all ye that hope in the Lord.