I have often heard it said even of things relating to the word of God that "ignorance is bliss" but I beg to differ! Ignorance is not bliss!
I dare say we will be held accountable for the times when we had the opportunity to know the truth but chose to remain ignorant or refused to hear it (As is stated in Proverbs 1:22-33).
Oh, I pray we will love the truth and seek for it as for hid treasure and never say "ignorance is bliss". For truly, the truth is a blessing and a treasure most precious!
"And ye shall know the truth, and the truth shall make you free." (John 8:32)
Willful ignorance will make you a prisoner where as knowledge will make you free!