This quote means that having good friends, reading good books, and feeling relaxed and content with life is an ideal way to live. Having good friends means having people around you who understand and appreciate you, who you can talk to and trust. Reading good books means being able to enjoy stories and ideas written by great authors. Having a sleepy conscience means feeling grounded and at peace with your decisions and actions, allowing yourself to rest and be content with your life. All together, these three things make for an ideal life.