Bhagavad Gita 7.1श्री भगवानुवाच मय्यासक्तमनाः पार्थ योगं युञ्जन्मदाश्रयः।असंशयं समग्रं मां यथा ज्ञास्यसि तच्छृणु ॥

He who wishes to attain some result or reward performs the ritual known as Agnihotra or does charity, sinks wells, builds hospitals, resting places, etc., with Sakama Bhavana (with an inner profit motive) and attains them. But the Yogi on the contrary practises Yoga with a steadfast mind and takes refuge in the Lord alone, with the mind wholly fixed on Him, on His lofty attributes such as omnipotence, omniscience, omnipresence, infinite love, beauty, grace, strength, mercy, inexhaustible wealth, ineffable splendour, pristine glory and purity.The servant of a king, though he constantly serves the king, has not got his mind fixed on him. The mind is ever fixed on his wife and children. Unlike the servant, fix your mind on Me, (the allpervading One), and take refuge in Me alone. Practise control of the mind in accordance with the instructions given in chapter VI. Then you will know Me and My infinite attributes in full.If you sing the glory and the attributes of the Lord, you will develop love for Him and then your mind will be fixed on Him. Intense love for the Lord is real devotion. You must get full knowledge of the Self without any doubt.He who has taken refuge in the Lord, and he who is trying to fix or has fixed his mind on the Lord cannot bear the separation from the Lord even for a second.