In the usual course of events, you will have your son with you on a daily basis, under your roof, at your dinner table, for about eighteen years. Plenty of time to say to him what needs to be said.
For example, on my seventeenth birthday, my senior year in high school, my dad and mom gave me a new Bible. An RSV. You can see above how he inscribed it:
Nothing could be greater than to have a son — a son who loves the Lord and walks with Him.
Your mother and I have found this Book our dearest treasure. We give it to you and doing so can give nothing greater. Be a student of the Bible and your life will be full of blessing. We love you.
Naturally, the first thing I did after reading that was turn to Philippians 1:6. It says, “And I am sure that he who began a good work in you will bring it to completion at the day of Jesus Christ.” So encouraging.
Apart from the words my dad spoke to me the day he led me to Christ, what he wrote above was his greatest statement to me ever. It has always proven true. I can hardly read it today without weeping.
Have you said this yet to your son? Many years from now, after you have left him, your son will remember your words. He will know they were true words, important words, words guiding him to Christ time after time. And he will be moved to the depths of his being.
But you must say this to your son. And the time is now.