Listen to the recitation of the eightteenth verse, first chapter, of the Hatha Yoga Pradipika. Get inspiration by this recitation:
तपः सन्तोष आस्तिक्यं दानम् ईश्वरपूजनम् ।
सिद्धान्तवाक्यश्रवणं ह्रीमती च तपो हुतम् ।
नियमा दश सम्प्रोक्ता योगशास्त्रविशारदैः ॥१८॥
You can recite these Hatha Yoga Pradipika Shlokas before practising any Hatha Yoga. If you want to recite along or just read the Sanskrit text (Devanagari and Roman Script), just go to Hatha Yoga Pradipika Site:
tapaḥ santoṣa āstikyaṁ dānam īśvara-pūjanam |
siddhānta-vākya-śravaṇaṁ hrīmatī ca tapo hutam |
niyamā daśa samproktā yoga-śāstra-viśāradaiḥ ||18||