1. The principle of mentalism

"The All is Mind; the Universe is Mental."

2. The principle of correspondence

"As above, so below; as below, so above.” This principle embodies the truth that there is always a correspondence between the laws and phenomena of the various planes of being and life.

3. The principle of vibration

"Nothing rests; everything moves; everything vibrates."

4. The principle of polarity

"Everything is dual; everything has poles; everything has its pair of opposites; like and unlike are the same; opposites are identical in nature, but different in degree; extremes meet; all truths are but half-truths; all paradoxes may be reconciled."

5. The principle of rhythm

"Everything flows, out and in; everything has its tides; all things rise and fall; the pendulum-swing manifests in everything; the measure of the swing to the right is the measure of the swing to the left; rhythm compensates."

6. The principle of cause and effect

"Every cause has its effect; every effect has its cause; everything happens according to law; chance is but a name for law not recognized; there are many planes of causation, but nothing escapes the law."

7. The principle of gender

"Gender is in everything; everything has its masculine and feminine principles; gender manifests on all planes."

The central philosophy of Thelema is in two phrases from Liber AL: "do what thou wilt shall be the whole of the law" and "love is the law, love under will". Crowley urged their use in everyday communications, and himself used them to greet people.