Joh 3:15 That whosoever believeth in him [in Jesus] should not perish, but have eternal life.
Joh 3:16 For God so loved the world [you and me], that he [God] gave his only begotten Son [Jesus], that whosoever believeth in him [in Jesus] should not perish [not spend eternity in Hell], but have everlasting life [spend eternity in Heaven]. [ see How to spend Eternity in Heaven ]
Joh 3:17 For God sent not his Son [Jesus] into the world to condemn the world; but that the world [you and me] through him [through Jesus] might be saved.
Joh 3:18 He that believeth on him [Jesus] is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God [Jesus].
Joh 3:19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
Joh 3:20 For every one that doeth evil hateth the light, neither [and will not] cometh to the light, lest his deeds should be reproved [exposed].
Joh 3:21 But he that doeth truth cometh to the light, that his deeds may be made manifest [seen plainly], that they are wrought in [done through] God.