Bg 7.10

bijam mam sarva-bhutanam
viddhi partha sanatanam
buddhir buddhimatam asmi
tejas tejasvinam aham

Word for word: 
bijam — the seed; mam — Me; sarva-bhutanam — of all living entities; viddhi — try to understand; partha — O son of Prtha; sanatanam — original, eternal; buddhih — intelligence; buddhi-matam — of the intelligent; asmi — I am; tejah — prowess; tejasvinam — of the powerful; aham — I am.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O son of Prtha, know that I am the original seed of all existences, the intelligence of the intelligent, and the prowess of all powerful men.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Bijam means seed; Krishna is the seed of everything. There are various living entities, movable and inert. Birds, beasts, men and many other living creatures are moving living entities; trees and plants, however, are inert – they cannot move, but only stand. Every entity is contained within the scope of 8,400,000 species of life; some of them are moving and some of them are inert. In all cases, however, the seed of their life is Krishna. As stated in Vedic literature, Brahman, or the Supreme Absolute Truth, is that from which everything is emanating. Krishna is Para-brahman, the Supreme Spirit. Brahman is impersonal and Para-brahman is personal. Impersonal Brahman is situated in the personal aspect – that is stated in Bhagavad-gita. Therefore, originally, Krishna is the source of everything. He is the root. As the root of a tree maintains the whole tree, Krishna, being the original root of all things, maintains everything in this material manifestation. This is also confirmed in the Vedic literature (Katha Upanisad 2.2.13):

nityo nityanam cetanas cetananam
eko bahunam yo vidadhati kaman

He is the prime eternal among all eternals. He is the supreme living entity of all living entities, and He alone is maintaining all life. One cannot do anything without intelligence, and Krishna also says that He is the root of all intelligence. Unless a person is intelligent he cannot understand the Supreme Personality of Godhead, Krishna.