In the present the eternal stays, the rest all drops out.

Divinity cannot be perceived through your brain, unless and until this light of your spirit shines into it.

That's the quality of the Spirit that you start feeling so joyous and the joy doesn't have the duality of happiness and unhappiness. It's singular.

Surrendering means cleansing yourself completely, getting completely detached. Detachment is the only way you can rise.

Present is the reality. The past is finished, and the future doesn't exist. When the Kundalini rises She elongates those thoughts and establishes in the center where there is complete thoughtless awareness. And spiritually you grow in that thoughtless awareness which in Sanskrit we call as Nirvichaar Samadhi.

...one need not, and should not, believe blindfolded in whatever is said about ascent or salvation, but should treat it like a hypothesis, and observe the facts with an open mind like a scientist.

You should be able to use your intellect and not to be dominated by your intellect.