For knowledge of the four paths [leading to Nibbāna], called sambodhi, one should develop the following seven factors:
• Sati - mindfulness
• Dhamma-vicaya - investigation of dhammas
• Viriya - energy
• Pīti - ecstasy
• Passaddhi - tranquillity
• Samādhi - concentration
• Upekkhā - equanimity
If these seven factors have been [fully] developed then this is called being well developed in the factors of enlightenment.
Here sati is considered in four ways: