The Bible gives a description of where wisdom comes from in many places, but one of my favorites is in Proverbs.
"Pro 2:1 My son, if thou wilt receive my words, and hide my commandments with thee;
Pro 2:2 So that thou incline thine ear unto wisdom, and apply thine heart to understanding;"...
I prefer what is written in the Bible which is the dead are sleeping, and when the Lord returns the dead in Christ will be raised and rewarded immortality.