ESV Isaiah 40:28-31
Have you not known? Have you not heard? The Lord is the everlasting God, the Creator of the ends of the earth. He does not faint or grow weary; his understanding is unsearchable He gives power to the faint, and to him who has no might he increases strength. Even youths shall faint and be weary, and young men shall fall exhausted; but they who wait for the Lord shall renew their strength; they shall mount up with wings like eagles; they shall run and not be weary; they shall walk and not faint.
Regardless of what you think is going to give you renewed energy in this world ... always remember YOUR strength comes from the Lord God Almighty. Your job or profession may have you down and you want to quit ... WAIT ON THE LORD. You may be tired of your marriage and ready to give up... WAIT ON THE LORD. Your family may be pulling on your last nerve and you're about 30s from cutting them off, WAIT ON THE LORD. Wait on the Lord so HE can renew your strength. We all fall down and need to get up not give up. Giving up is not the answer whether physically, spiritually, mentally, or socially. None of our lives were close to what Jesus experienced and if God never permitted him to give up, why would he want the same from you. Especially when he gave his only son for you. Remember the devil wants you isolated so he can pluck you out like a deer in an open field.
However, God's word says, "Have you not known? Have you not heard? The Lord is the everlasting God, the Creator of the ends of the earth. He does not faint or grow weary; his understanding is unsearchable." He understands everything you are going through. Before you go weary in your own thinking, wait for the Lord to renew your strength.