Brihadaranyaka Upanishad 2.1.7

2.1.7

sa hovāca gārgyo ya evāyamagnau puruṣa etamevāhaṃ brahmopāsa iti sa hovācājātaśatrurmā maitasminsaṃvadiṣṭhā viṣāsahiriti vā ahametamupāsa iti sa ya etamevamupāste viṣāsahirha bhavati viṣāsahirhāsya prajā bhavati

Gârgya said: 'The person that is in the fire (and in the heart), that I adore as Brahman.' Agâtasatru said to him: 'No, no! Do not speak to me on this. I adore him as powerful.' Whoso adores him thus, becomes powerful, and his offspring becomes powerful.