In talking about open mind, we are referring to a kind of openness that is related with letting self-existing awareness come to us. And awareness is not something thatneeds to be manufactured: when there is a gap, awareness enters into us. So awareness does not require a certain particular effort. Such an effort is unnecessary inthis case. Awareness is like a wind. If you open your doors and windows, it is bound to come in.
Page 116, in "From Raw Eggs to Stepping-Stones" in THE PATH IS THE GOAL: A BASIC HANDBOOK OF BUDDHIST MEDITATION.