yac capi sarva-bhutanam
bijam tad aham arjuna
na tad asti vina yat syan
maya bhutam caracaram

"Furthermore, O Arjuna, I am the generating seed of all existences. There is no being—moving or nonmoving—that can exist without Me."

Yad = whatever, bijam = seed or origin of, sarva-bhutanam = everything [in this Universe], tad = that [seed or origin], aham = I [Sri Krishna] am, arjuna = [listen] Arjuna. For all the clothes we wear, like dhoti or shirt or saree, cotton is raw material and cotton seed is the origin. Similarly, for the various ornaments gold is the material and ore is the origin. Thus, for everything we see, we realise that some origin is there. The Lord is the origin of all of them. Once we know the cause, we can realise all effects [karya-karana bhava]. In Chandokyopanishad, father Uddhalaka tells his son Swetaketu that by understanding mud, one can realise all articles like pot or toy. By understanding Bramham, everythig in this Universe can be known. The Lord mentions this here to drive home the point that just like He was Vishnu among Adityas, Sankara among Rudras, Sama veda among Vedas, etc., whatever items Arjuna or we can imagine, He represented all. Here, Sri Vamana can be considred as Karana (Cause) and Sri Trivikrama as the Karya (Effect). Caracaram bhutam = in all things in the Universe [chara = movable, achara = non-movable], maya vina = separated from or without Me [Sri Krishna], yat syat = if searched, na tad asti = there is nothing. If one were to search for any item in this Universe, which is different from the Lord or which is not controlled by the Lord by being in that, one would not find that item. Without any exception, there is nothing which is not His nor conrolled by Him. Uddhalaka says ' idam sarvam tad satyam sa atma tatvamasi swetaketo' [entire Universe is, with the Lord as antaratman; He pervades all without exception]. Once this is realised we can see all as equals. Till this sloka, the Lord had mentioned groups of entities in which He represented the more important ones. 
                                                                                                  (continued)