If you concentrate on qi you will be weak
If you concentrate on spirit you will be strong

This is a famous Taiji adage. My teacher pointed out once that when they say qi (ch'i) they actually mean anything that isn't spirit. So, if you use mind expanding drugs to open up consciousness, which a lot of students seem to do nowadays, be aware that this must go hand in hand with disciplined daily practice on and with spirit otherwise it'll end up weakening you. There's little point in having knowledge you don't have the means to either engage or internalise.