भूयो भूयः परे भावे भावना भाव्यते हि या । जपः सोऽत्र स्वयं नादो मन्त्रात्मा जप्य ईदृशः ॥ १४५ ॥
Contemplate on the thought of being in the supreme consciousness again and again; this is also japa. That self- sound (which is spontaneously produced) is verily the soul of mantra. Japa is done like this.