Excerpt from "My Life in Christ":

How easily and instantly can God save us! Often, I would be a great sinner in daytime, but in the evening after prayer, I would retire absolved, with deep serenity and peace in my heart, and by the Grace of the Holy Spirit, be whiter than snow. How effortless it is for God to save us even in the evening of our life, at the twilight of our days. O, save me, save me Lord, receive me into Your Heavenly Kingdom, for everything is possible for You. Even if we fall, we fall before our Lord. And He is able to make us stand up (Romans 14:4).

St. John of Kronstadt