Tatra: There (in that Ishvar)
Niratishayam: Unsurpassed, which has no atishay (highest point)
Sarvagya: All-knowing, omniscient
Patanjali lists more qualities of Ishvar
In that Ishvar dwells the seed of limitless, unsurpassed gyan, this gyan has no highest point, it is unending/infinite.
If you are engaged in the limited and unreal, you miss the essence or reality of Creation. For example, if you are busy observing a squirrel cracking a nut in the garden, till you are focussed there, you are oblivious to the complete picture of the garden. Dhyan of Ishvar, the frequency which is beyond the ambit of klesh, karma, vipaak and ashaya, uplifts the being from the mundane aspects of Creation, from unreality and when that happens, the reality (ultimate gyan) of Creation dawns. Hence, in contemplation of Ishvar lies the seed of limitless gyan.