I have read the articles on blasphemy and they have given me a better understanding of what it is. But I am still not sure if a person can think blaphemous thoughts not speak them and still be condemned. I feel that God is so distant from me and that this is because His Spirit no longer walks and lives in me. How would I know?
If you entertain sin in your life, of course God will feel distant to you. It doesn't have to be just blasphemy. "Behold, the LORD'S hand is not shortened, that it cannot save; nor His ear heavy, that it cannot hear. But your iniquities have separated you from your God; and your sins have hidden His face from you, so that He will not hear" (Isaiah 59:1-2).
"Now by this we know that we know Him, if we keep His commandments. He who says, "I know Him," and does not keep His commandments, is a liar, and the truth is not in him. But whoever keeps His word, truly the love of God is perfected in him. By this we know that we are in Him" (I John 2:3-5).