The brahma sutra says:
--that from which all this is born!
The brahma samhita says:
ishwaraH paramaH krishNA sachidAnanda vigraH
anAdirAdiH govindaH sarva kAraNa kAraNam
--that ishwaraH (herein mentioned Krishna, but all the same) who is sat-chit-Ananda is the (causeless) cause of all causes!
The gaNapati atharvashirSopanishad says:
namaH te gaNapataye (I'm thankful to Mahabaleshwar-ji for pointing this out instead of the one that follows).
--revered salulations to thou, Ganapati
There's a lot of meaning in such a seemingly simple salutation. The te is rightly understood as the tvam pada of tattvamasi. And then, gaNapati is seen the tat as well as the tvam!
or the following verse...
tvameva pratyakshaM tattvamasi
--thou art that shruti mahAvAkya thou art that! So very beautifully
put. Ah, the bliss! AnandohaM AnandohaM AnandaM brahmAnandaM