The Dale Carnegie course can help a person improve his life, but deep, vital,Spiritual experiences which result in a rearrangement of the forces which drive a man's mind cannot be explained by medical science.They cannot be brought about by synthetic methods, though many Doctors have tried.
Jung and his followers attempted it in the 'twenties and 'thirties, calling it " moral psychology", but it was a hit and miss affair. Jung was honest enough to admit that it seemed to be the province of some Higher Power beyond his ability to define.
And...... if a man found inner peace and a better life by communing with his ancestors, who am I to denigrate it?
The important things which add to our daily lives lie outside the province of proper science. The "scientific rope" is not long enough to fashion a loop which will encompass the whole of the Universe.
Curdog,
The 20's were almost a 100 years ago. We've learned a whole lot since then.
