Nobody learns tai-chi from reading a book (it would be miracle through reading a blog, this one in particular :)). We need a teacher, a master, a coach, or a sifu. Tai-chi is something that needs to be experienced, and need a helping hand or rather a helping speaking voice that says "This is the (internal) feeling that I ask for!" And you got it, but to forget about it the next time you're doing it in front of your teacher, and he reminded you again and again when you got that same fleeting (internal) feeling, until one day you got it, almost instinctively, and now your can teach! It is the same for spirituality: the day you know that you got it is the day you can teach, and the same day your master urged you to "Take the road and start teaching!"
If you're not ready to teach, you're still not there, same for tai-chi, same for spirituality. Jesus knew it then, you teacher knows it now. Well I suppose your teacher does...:):)