Romans 1:19-20 AMP

19 For that which is known about God is evident to them and made plain in their inner consciousness, because God [Himself] has shown it to them. 20 For ever since the creation of the world His invisible nature and attributes, that is, His eternal power and divinity, have been made intelligible and clearly discernible in and through the things that have been made (His handiworks). So [men] are without excuse [altogether without any defense or justification],

John 3:16 KJV

For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

1 John 4:14 AMP

And [besides] we ourselves have seen (have deliberately and steadfastly contemplated) and bear witness that the Father has sent the Son [as the] Savior of the world.1