Wherefore lift up the hands which hang down, and the feeble knees; (KJV) ( Hebrews 12:12 )
Have you ever been working out, tired and struggling, then someone comes along and gives an encouraging word? We had the strength inside all along, but just needed to gather our strength.
God is our trainer encouraging us on to stretch ourselves to reach higher accomplishments. We do have the courage to keep on pushing through.
If you are feeling tired, take a moment to regain your composure and strengthen yourself. You are capable of more than you think you are.