One of the best quotes on Kundalini-awakening:
There is a higher magic vested in all of us that none can control but everyone can use.
Kundalini is described within Eastern religious, or spiritual, tradition as an indwelling Divine feminine energy that can be awakened in order to purify the subtle system and ultimately to bestow the state of Yoga, or Divine Union (e.g. see Jnaneshwari Ch. VI).
This movement of Kundalini is felt by the presence of a cool or, in the case of imbalance, a warm breeze across the palms of the hands or the soles of the feet. Such a phenomenon can be seen to be described in a diverse array of scripture (see Aquarian Gospel of Christ, ch. 44, v19, ch. 161, v35, ch. 162, v4; Jnaneshwari, ch.6; Ezekiel, ch. 37, vs. 5-6: Old Testament; John, ch. 14 vs. 15- 17 & 25: New Testament; Koran, sura 24, vs. 24; sura 35, vs. 9; sura 36, vs. 64; see also Descieux, 1998iii.). It is through attention to these sensations that areas of difficulty can be identified and ‘worked on’ in order to strengthen the meditation.
Here is the link for the simple first-time experience of this magical power.