Powerful words.
It means from God’s point of view, He has already provided proof.
Even more, He (in the way things exist) has provided information to us as to his nature.
What do I mean by that?
Are you familiar with the concept of the Tri-une nature of God (Trinity)?
God the Father, God the Son, God the Holy Spirit. (3 in One) is the concept.
But, how can three things be one thing? Romans 1:20 says creation can explain it, that is, if the Trinity is true.
Is it?
Space - 3 dimensions (Height, Width, Depth) - which, without all three, the volume of the entire universe would be ZERO (all three must exist for us to have space).
Time - 3 dimensions - Past, Present, Future
Matter - 3 basic (non-charged at rest states) Liquid, Solid, Gas
Matter - Electrons, Protons, Neutrons
Color - three major components...
Life - Plants, Animals, Mankind
Earth - Land, Sea, Air
etc, etc, etc