The subtle body must be intact to transmit the kundalini.
Winning begins at home. It begins with your thoughts and your actions.
How do you know you were in samadhi? You know when your awareness returns to the plane of self and ideation that you have been beyond it.
Lao Tsu doesn't seem to hold to much stock for words or phrases or teachings.
If the tonal collapses completely, then you're crazy functionally, you're psychotic.
Meditation is not impractical or unrealistic, nor is it difficult to integrate with any lifestyle or age, in that it's timeless, although it occurs in time.