if. Implying a contingency. Greek. ean (with Subj.) See App-118. Forgiveness was conditional in that dispensation of the kingdom.
trespasses = lapses, varying in degree. Greek plural of paraptoma.
heavenly. Here the emphasis is on Father, the adjective ouranios being used, instead of the noun, in regimen. It occurs only here, verses: Mat_6:26, Mat_6:32, Mat_6:13, Luk_2:13, Act_26:19; and in the critical texts, additional in Mat_5:48; Mat_18:35; Mat_23:9.
also forgive you = forgive you also (emphasis on "you").