Odd Experience in Meditation

I feel that when I sit down to meditate, when I am completely still and just sitting, my mind tends to be not very pliable. It's like I cannot do anything, just be conscious without the ability to direct my attention. However, when I am on a bus, or walking, my attention is easily directed; it is only when I am in sitting posture that something seems to freeze my mind and attention, or make it less pliable. In sum, it feels, sitting, that I cannot do *anything*. Could this be something with the energetic body? Something with the inner channels? I dunno. Also, this tendency towards lack of pliancy makes my static meditations very difficult. Should I just sit consistently in this non-pliant state and just wait it out? Thanks for any feedback.