If we fail it's not the end. It's in the Bible, Psalm 37:23-24, TLB. "The steps of good men are directed by the Lord. He delights in each step they take. If they fall it isn't fatal, for the Lord holds them with His hand."
Even good people sometimes fail. It's in the Bible, Psalm 34:19, TLB. "The good man does not escape all troubles—he has them too. But the Lord helps him in each and every one."
It's not about how many times you fall, it's how many times you get back up. It's in the Bible, Proverbs 24:16, NIV. "for though a righteous man falls seven times, he rises again, but the wicked are brought down by calamity."
You can succeed next time. It's in the Bible, Philippians 4:13, TLB. "For I can do everything God asks me to with the help of Christ who gives me the strength and power."
Expect trials and battles - they will come, but Christ has won the war for us! It's in the Bible, John 16:33, NKJV. "These things I have spoken to you, that in me, you may have peace. In the worl you will have tribulation; but be of good cheer, I have overcome the world."
Don't let failure discourage you. It's in the Bible, Joshua 1:9, TLB. "Yes, be bold and strong! Banish fear and doubt! For remember, the Lord your God is with you wherever you go."
Though it may look like we have failed - we are still more than conquerors in Christ. It's in the Bible, Romans 8:36-37, NKJV. "As it is written: “ For Your sake we are killed all day long; we are accounted as sheep for the slaughter.” Yet in all these things we are more than conquerors through Him who loved us."