For bodily exercise profits a little, but godliness is profitable for all things, having promise of the life that now is and of that which is to come. 1 Timothy 4:8
 
Becoming a Christian is better for you now and much much better for you in eternity.  It is better for you now because you can rest assured on eternal life, because you will have the Holy Spirit living in you to lead and guide you, because you will realize that you aren’t just living for yourself but you are living for Jesus who loved you and died for you.
 
Becoming a Christian is better for you in eternity because it means that you have been forgiven of your sins and given eternal life with Christ in heaven.  God is the giver of all good things and heaven will be the sum of all that God is.  Hell, on the other hand, is a place that the Bible describes as eternal torment where there is continual weeping and gnashing of teeth for eternity.
 
So becoming a Christian is better for you now and much better for you in eternity.
 
I often hear people say, “Well becoming a Christian will make you a better person.”  This is the wrong reason to become a Christian.  Yes, it will change you, but that isn’t the right reason.  Check out this next verse
 
 If in this life only we have hope in Christ, we are of all men the most pitiable. 1 Corinthians 15:19
 
Why are we the most pitiable?  Because we have the most hope!  The hope of each Christian is not merely to have a better life here, the hope of the Christian is eternity with Christ!
 
Our hope is in Christ – that he truly is the Son of God, lived a perfect life, died on the cross for our sins, and proved that He has power over death by rising from the dead.
 
1 Corinthians 15:13-19
13 But if there is no resurrection of the dead, then Christ is not risen. 14 And if Christ is not risen, then our preaching is empty and your faith is also empty. 15 Yes, and we are found false witnesses of God, because we have testified of God that He raised up Christ, whom He did not raise up—if in fact the dead do not rise. 16 For if the dead do not rise, then Christ is not risen. 17 And if Christ is not risen, your faith is futile; you are still in your sins! 18 Then also those who have fallen asleep in Christ have perished. 19 If in this life only we have hope in Christ, we are of all men the most pitiable.