“Believe”, which is defined as to accept that something is true, especially without proof.

No one should ever allow their own opinions, positions, preferences and for that matter agendas to override the authority of Holy Scripture…

*John 3:16 “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.”

Grace - the unmerited favour with God…

Romans 3:24 Being justified freely by his grace through the redemption that is in Christ Jesus:

Romans 4:4, 16 “Now to him that worketh is the reward not reckoned of grace, but of debt.” ... 16 “Therefore it is] of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,”

Grace is not a mandate… Grace is just there… it is held within the gift of God found solely through faith: Ephesians 2:8-10 “For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: 9 Not of works, lest any man should boast. 10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.”