When we hear the statement "You will reap what you sow," that typically brings something frightening to mind. It is usually quoted in an aggressive fashion as if to say, "You'd better stop doing that because the Bible says you will reap what you sow." And that is true.
But let's understand it in context: "Do not be deceived, God is not mocked; for whatever a man sows, that he will also reap. For he who sows to his flesh will of the flesh reap corruption, but he who sows to the Spirit will of the Spirit reap everlasting life" (Galatians 6:7–8). Yes, if you sow to the flesh, if you disobey God, then you will reap the consequences. But if you sow to the Spirit, you will reap everlasting life.
The decisions we make on earth are binding in eternity. It is here we decide where we will spend all eternity.
Revelation 22:11 tells us, "He who is unjust, let him be unjust still; he who is filthy, let him be filthy still; he who is righteous, let him be righteous still; he who is holy, let him be holy still." Obviously God is not encouraging wicked people to do wicked things. This is more of a warning.
I like the way Charles Swindoll paraphrased it in his commentary entitled Insights on Revelation
: "You wrongdoers, go ahead and keep doing wrong. Just see what happens. . . . As for you righteous and holy saints, keep practicing righteousness, keep being holy—and you'll get your reward in due time."
What you are today will determine what you will be tomorrow and for eternity. So, if you are a godly person, then keep doing what you are doing. It's going to turn out beautifully for you in the end.