Why are we not seeing miracles in our lives? I am wondering why we as Christians are not seeing those great miracles of old and as promised in Mark 11 vs 17 &amp; 18.

Or is it we are failing short or miracles were for a specific period?
There are two major views on this, with several subsets.


Some (including myself) believe that while miracles do still occur, the kind and frequency is different than we see at the beginning of the church era because the purpose is different; directly binding the occurrences of miracles to the creator. This is generally known as Cessationism, but there are several flavors. The promises you refer to in Mark and elsewhere are understood in a the framework of the Gospel empowering the Kingdom to grow and the greater miracles  refer to the kinds of supernatural events we do continue to see regularly: the regeneration of people through the message of the Gospel.
Others believe that we don't see as many miracles today because people don't have enough faith; directly relating the spiritual state of people to prevalence of miracles. In this camp (which could be called Continuationism but more often is just known as non-Cessationist or by the names of specific traditions which hold the view) the Holy Spirit is understood to have varying degrees of control over miracles, from bringing them when he will to only being able to bring them when called on in full faith.