Salvakalpa samadhi is absorption in eternity to the point where there is no real concept of self but there's still a karmic chain. Nirvikalpa samadhi is absorption in nirvana; concepts of self and no-self go away completely.

In terms of spiritual development, it's not a big deal whether you have sex or not, the question is more of who you have sex with and what their energy is doing to you.

In Tantric Zen there is no rule. There is only your immediate experience.

People you are emotionally open to can drain your power level or raise it tremendously, depending on what their intentions are.

Do a strong work meditation all day. You won't be as exhausted as everyone else because you have been gaining a kind of internal power from your work.

Meditation is not for everybody. When you meditate you become conscious. Most people don't want to be too conscious because they are afraid of awareness, of death, and of being happy.

Your existence is passing before you. Grains of sand in the hourglass. The Wicked Witch of the West has you in her castle and she's turned the hourglass over and the sand is running through. Will you be liberated or will you die? The only way you can beat death is liberation.