Your mouth/tongue is the end of discussion as far as your destiny is concerned. For, whatever you dare to speak undoubtedly/convincingly to/for yourself presently is what will surely/subsequently/eventually come to pass. Oh! Yes, if you dare to open up your mouth wide now then, God himself will be moved to fill it up with lots of goodies afterwards (Psalms 81 : 10). Therefore, dare to speak positively and never negatively all-round/at all times.
Emeasoba George