The sa esah piirvesam api guruh kalena anavacchedat yogic sutra states that Almighty is the first and principal master of everything. He can never be bounded by conditional proposes. Everything starts within Him, and everything culminates within him.

sa that
esah Purusa or God
piirvesam first, foremost
api also, too, besides, in addition to
guruh master, preceptor
kalena time
anavacchedat unbounded, unlimited, uninterrupted, undefined, continuous

God is the first, foremost and absolute guru, unconditioned by time.

This spiritual Purusa, the Supreme Spirit, is the first and foremost teacher, neither bound nor conditioned by place, space or time. He is all and all is He.