There's no other way to slice this answer than you believe because of your intellect and reasoning abilities.
So others DON'T believe because they have not been persuaded, which means they are dumber than you?
Runs completely counter to much Scripture. Like here:
1 Corinthians 1:26-29 King James Version (KJV)
26 For ye see your calling, brethren, how that not many wise men after the flesh, not many mighty, not many noble, are called:
27 But GOD HATH CHOSEN the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty;
28 And base things of the world, and things which are despised, hath God chosen, yea, and things which are not, to bring to nought things that are:
29 That no flesh should glory in his presence.