If the mind is engaged in Kṛṣṇa's service, then the senses are automatically engaged in His service. This is the art, and this is also the secret of Bhagavad-gītā: total absorption in the thought of Śrī Kṛṣṇa.
Modern man has struggled very hard to reach the moon, but he has not tried very hard to elevate himself spiritually. If one has fifty years of life ahead of him, he should engage that brief time in cultivating this practice of remembering the Supreme Personality of Godhead.