When Paul wrote these words, he was only a short time and distance from sudden death at the hands of the Romans. He speaks here of the certainty of his eternal destiny. We are to be overwhelmingly certain about our relationship with God, in the sure realization of what He has wrought in our lives. The question of certainty is quite a problem for many. Youth in particular want to he sure.
Adults look for a strong staff to lean on.
God desires to produce in us an eminent Christian character. This is the day for the noblest and the best in life. Our faith is intended to produce in us a passion for purity, honesty, and Christlikeness. Everything noble in our lives springs from our identification with Him. He makes its strong to resist corruptions, sustains its to endure trials and sorrows, inspires its to make the greatest sacrifices in His service.