Mere logic cannot explain how even material objects expand their potency.

“Mere logic cannot explain how even material objects expand their potency. These things can be understood by mature observation. The Absolute Truth expands His potency in the creation, maintenance and annihilation of the material world just as fire expands its potency of heat.” (Viṣṇu Purāṇa 1.3.2) Śrīla Jīva Gosvāmī explains that one can understand the power of a valuable gem not by logical statements but by observing the effect of the gem. Similarly, one can understand the potency of a mantra by observing its power to achieve a particular effect. Such potency doesn’t depend on so-called logic. There is no logical necessity for a seed’s growing into a tree and giving fruits that nourish the human body. One may argue that the genetic code for the entire tree is contained within the seed. But there is no logical necessity for the existence of the seed, nor for the seed’s expanding itself into a gigantic tree. Ex post facto, or after the manifestation of the wonderful material nature, the foolish material scientist traces out the expansion of a seed’s potency in an apparently logical sequence of events. But there is nothing within the realm of so-called pure logic that dictates that a seed should expand into a tree. Rather, such expansion should be understood to be the potency of the tree. Similarly, the potency of a jewel is its mystic power, and various mantras also contain innate potencies. Ultimately the mahā-mantra — Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare — has the potency to transfer one to the spiritual world of bliss and knowledge. In the same way, the Absolute Truth has the natural quality of expanding itself into innumerable varieties of material and spiritual worlds. We may logically describe this expansion after the fact, but we cannot deny the expansion of the Absolute Truth. The conditioned soul who purifies his consciousness through the process of devotional service can scientifically observe the expansion of the Absolute Truth as described here, just as one who is not blind can observe the expansion of a seed into a huge tree. One can understand the potency of a seed not by speculation but rather by practical observation. Similarly, one must purify his vision so that he can practically observe the expansion of the Absolute Truth. Such observation can take place either by the ears or by the eyes. Vedic knowledge is śabda-brahma, or transcendental potency in the form of sound vibration. Therefore, one can observe the functions of the Absolute Truth through submissive hearing of transcendental sound. śāstra-cakṣus. When one’s consciousness becomes fully purified one can perceive the Absolute Truth with all of one’s spiritualized senses.

Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Eleventh Canto, Chapter 03 – Text 37.