Lamentations 3:25 KJV

The LORD is good unto them that wait for him, to the soul that seeketh him.

The essence of this verse is to trust in the Lord. To wait on the Lord is wise. God is good to those who wait on Him. Waiting, though difficult, is the way through trials. This is advice from Jeremiah to Israel. Scripture tells us that the things that happened to Israel were for our example. How God dealt with them is how He will deal with us. How we should respond to Him is also the same. When faced with trial, we, too, should quietly wait on the Lord. The response to trials is to receive humbly at the hand of God that which He sends, remaining humble. Those who are under God's hand of affliction must realize from whom it comes, and trust Him who sent it. No matter the apparent source of a trial, it is the Lord’s doing. Romans 8:28 tells us that all things work together for good to those who love God, who are called according to His purpose. The most awful things that can come our way will in the end bring about glory to God, and growth in Him for us. The most obvious example of this is David who committed the sins of adultery and murder. But his predecessor to the throne was born of the same woman. God’s hand is always on His own. And His ways are always right regardless. These things being so, the believer is called to lean on and trust God. God's goal is not affliction or grief just for the fun of it. God is compassionate. He desires nothing but the best for those that are His. But, what is best is not always what we think is the best. God's view of things is so much longer than ours. When we come into affliction, God's mighty hand is upon us. To those in Jerusalem at the time this verse was written, the invasion by Babylon and destruction of the city, was a great trial. One can only imagine the fear, heartache, loss, and pain. Undoubtedly hunger and sleeplessness were part of the ordeal, too. But here Jeremiah makes it clear to those who know God that God's plan includes their ultimate good. This trial is not to their destruction. Hereby God will prove His faithfulness to them. They will know of His care. They will see that He is faithful. This affliction is not something that will end in their destruction.
So what is the way in trials? Lamentations 3:27-30 gives the answer; quietly wait on and trust in Him. The Israelites in Jerusalem, who were God's, had no choice in their affliction. It came upon them, and turned their world upside down. The only choice they had was to trust the Lord - and wait. We really have no other choice, either. So we are to look to Him in affliction. We are to humble ourselves under His hand. We are to lean on Him, and trust in Him. He does not afflict willingly, neither grieve. He will have compassion according to the multitude of His mercies. And He will be faithful.