Fundamental belief

Bhagawad geeta: 4-39
Śhraddhāvān labhate jñānaṁ tat-paraḥ samyatendriyaḥ jñānaṁ labdhvā parāṁ śhāntim achireṇādhigachchhati

One with devotion attains knowledge and shall be able to regulate the senses. By gaining the right knowledge one shall be able to attain supreme unending peace.

Working philosophy

Bhagwad geeta: 2-47
Karmanye vadhikaraste Ma Phaleshu Kadachana, Ma Karmaphalaheturbhurma Te Sangostvakarmani

You have a right to “Karma” (actions) but never to any Fruits thereof. You should never be motivated by the results of your actions, nor there be any attachment in not doing your duties.