There are many times in which we need strength. We may need physical strength in which our bodies are tired from doing too much things, from sickness/disease or an injury. We may need emotional strength where our hearts and minds have been burdened by problems or worries. We may even need spiritual strength in which feel we have wandered away from the Lord. No matter the need whether physical, emotional, or spiritual, at some point we need renewed strength.
Many times when our bodies are weak, we feel we should rest and step back from doing too many things. It's true that we do need rest. As we sleep and rest, our bodies begin to rebuild itself. The problem is when we get too much rest, we end up getting weaker because our muscles begin to atrophy. Sometimes in order for our bodies to become stronger, we have to do some type of exercise. When we're emotionally drained, we may feel we need to be alone and away from people. When we do that, we end up isolating ourselves and may enter into depression. When we're spiritually weak, we may feel that God doesn't want us so we stay away. However, that's farthest from the truth.
When we need renewed strength, what should we do? Isaiah 40:31 says, "But those who wait for the Lord [who expect, look for, and hope in Him] shall change and renew their strength and power, they shall lift their wings and mount up [close to God] as eagles [mount up to the sun]; they shall run and not be weary, they shall walk and not faint or become tired" (AMPC). You may ask, "How does waiting on the Lord renews my strength"? Well, waiting is not a passive event. Think of a waiter in a restaurant. That person isn't just standing idly by just watching what's going on in the restaurant. That person is actively serving. They asking what you want, they bring you your drinks and food, they ask if everything is okay with your meal. They are serving and working. When we 'wait' on God, we are actively serving Him. We're asking Him what He wants, what pleases Him, and the direction we should walk in. As we serve Him, our focus is no longer on us which drains us, but on Him which gives us strength.
So, just like doing some type of exercise will give our bodies strength, we need to actively serve God and He will give our whole being (body, soul, and spirit) strength. When God steps in, we won't be tired anymore! Thank God! Have a blessed week!