Both words are emphatic. Ἔστιν is, is used as in Joh 8:58 (see note), to express Christ's absolute existence. “He emphasizes the personality, is the preexistence” (Lightfoot). For similar emphasis on the pronoun, see Eph 2:14; Eph 4:10, Eph 4:11; 1Jo 2:2; Rev 19:15.
Before all things
By Him (ἐν αὐτῷ)
In Him as Col 1:16. So Rev.
Cohere, in mutual dependence. Compare Act 27:28; Heb 1:3. For other meanings of the verb, see on Rom 3:5. Christ not only creates, but maintains in continuous stability and productiveness. “He, the All-powerful, All-holy Word of the Father, spreads His power over all things everywhere, enlightening things seen and unseen, holding and binding all together in Himself. Nothing is left empty of His presence, but to all things and through all, severally and collectively, He is the giver and sustainer of life.... He, the Wisdom of God, holds the universe in tune together. He it is who, binding all with each, and ordering all things by His will and pleasure, produces the perfect unity of nature and the harmonious reign of law. While He abides unmoved forever with the Father, He yet moves all things by His own appointment according to the Father's will” (Athanasius).