Be not content with future happiness — It has no meaning
From A Course in Miracles —
T-26.VII.2:1-3
All sickness comes from separation. When the separation is denied, it goes. For it is gone as soon as the idea that brought it has been healed, and been replaced by sanity.
T-26.VII.16:1-2
The miracle but calls your ancient Name, which you will recognize because the truth is in your memory. And to this Name your brother calls for his release and yours.
T-26.VIII.9:1-3
Be not content with future happiness. It has no meaning, and is not your just reward. For you have cause for freedom now.