Don't get me wrong -- we still need God's grace -- but hopefully not as often as we did when we were new believers. We have had more time to grow in the grace and knowledge of our LORD Jesus Christ and should have long ago stopped putting His grace to the test.
We need to have more patience with younger believers in our lives -- not to judge them and think ill of them because they don't have it all together. They have a lot to learn and God gives grace to them, and will be with them as they go through trials and testings of their faith in the 'learn by doing' method. We've been there, done that; have the stretch marks.
I thank God that "His mercy endures forever." Keep that in mind when praying for straying sheep and lambs. Beg Him for His mercy on their behalf when fasting and praying for those you love who appear to be backsliding. Don't count them out so quickly.
Warn, without accusing;
Correct, without punishing;
Exhort, without lecturing;
Reprove, without condemning.
Be an example to them and always keep your door open and offer a shoulder for them to cry on. Pray without ceasing for those that the LORD has placed on your heart. As the old saying goes,' be part of the solution and not part of the problem.'
"Now accept the one who is weak in faith, but not for the purpose of passing judgment on his opinions...Who are you to judge the servant of another? To his own master he stands or falls; and he will stand, for the Lord is able to make him stand." - Rom 14:1,4
"For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food. For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is an infant. But solid food is for the mature, who because of practice have their senses trained to discern good and evil." - Heb 5:12-14