If “all the promises of God find their Yes in [Jesus],” then to trust him now in the present is to believe that his promises will come true.
Those are not two separate faiths — trusting him, and believing in his promises. Believing in Jesus means believing that he keeps his word. Being satisfied in the crucified and risen Jesus now includes the belief that at every future moment, to all eternity, nothing will separate us from his love, or keep him from working all things together for good.
Putting it all together, I would say that the spiritual beauty we need to embrace is the beauty of God that will be there for us in the future, certified for us by the glorious grace of the past.
We need to taste now the spiritual beauty of God in all his past achievements — especially the death and resurrection of Christ for our sins — and in all his promises. Our confidence and trust must be in all that God himself will be for us in the next moment, and in the next month, and in the endless ages of eternity — “the light of the knowledge of the glory of God in the face of Jesus Christ” (2 Corinthians 4:6).
It is he and he alone who will satisfy the soul in the future. And it is the future that has to be secured and satisfied with spiritual riches of glory, if we are to live the radical Christian lives that Christ calls us to live here and now.
If our present enjoyment of Christ now — our present faith — does not have in it the Yes to all God’s promises, it will not embrace the power for radical service in the strength that God (in every future moment) will supply (1 Peter 4:11).
My prayer is that reflecting like this on the essence of faith will help us avoid superficial, oversimplified statements about believing the promises of God. It is a deep and wonderful thing.