“Endeavor executed with intelligence in Krishna consciousness is called utsaha, or enthusiasm. The devotees find the correct means by which everything can be utilized in the service of the Lord (nirbandhah krishna-sambandhe yuktam vairagyam uchyate).” (Shrila Prabhupada, Nectar of Instruction, Verse 3 Purport)

“Covered with flowers, Hanuman, the son of the wind, became brilliant in the middle of the Ashoka grove, looking like a mountain of flowers.” (Valmiki Ramayana, Sundara Kand, 14.11)

“The Personality of Godhead heard the appealing voices of His friends, and casting a pleasing glance over them, He began to answer. By speaking through His eyes, He impressed His friends that there was no cause for fear. Then Krishna, the supreme mystic, the powerful Personality of Godhead, immediately swallowed up all the flames of the fire. The cows and boys were thus saved from imminent danger.” (Krishna, The Supreme Personality of Godhead, Volume 1, Chapter 19)

“This knowledge is the king of education, the most secret of all secrets. It is the purest knowledge, and because it gives direct perception of the self by realization, it is the perfection of religion. It is everlasting, and it is joyfully performed.” (Lord Krishna, Bhagavad-gita, 9.2)

“Engage your mind always in thinking of Me, offer obeisances and worship Me. Being completely absorbed in Me, surely you will come to Me.” (Lord Krishna, Bhagavad-gita, 9.34)

“O King, as I repeatedly recall this wondrous and holy dialogue between Krishna and Arjuna, I take pleasure, being thrilled at every moment.” (Sanjaya, Bhagavad-gita, 18.76)

“We may find some mailboxes on the street, and if we post our letters in those boxes, they will naturally go to their destination without difficulty. But any old box, or an imitation, which we may find somewhere, which is not authorized by the post office, will not do the work. Similarly, God has an authorized representation in the Deity form, which is called archa-vigraha. This archa-vigraha is an incarnation of the Supreme Lord. God will accept service through that form.” (Shrila Prabhupada, Bhagavad-gita, 12.5 Purport)

“If one offers Me with love and devotion a leaf, a flower, fruit or water, I will accept it.” (Lord Krishna, Bhagavad-gita, 9.26)