“Could technology, understood as the disposition and activity of mastery, turn out to be a stumbling block in the path of the master himself?”

“Women have ever been the stumbling block and betrayers of ambition.”

“Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.”

“The long history of mankind is studded with convergences, perhaps most notably in social systems and the use of artefacts and technology. But for human history, set in the arrow of time, there appears to be one intolerable stumbling-block. This is the catastrophic failure in human values and decency.”

“The bible and the church have been the greatest stumbling block in the way of women's emancipation.”

“The only real stumbling block is fear of failure. In cooking you've got to have a what-the-hell attitude.”

“The art of growing old is the art of being regarded by the oncoming generations as a support and not as a stumbling-block, as a confidant and not as a rival.”

“There will always be rocks in the road ahead of us. They will be stumbling blocks or stepping stones; it all depends on how you use them.”

“Instead of looking on discussion as a stumbling block in the way of action, we think it an indispensable preliminary to any wise action at all.”

“The future masters of technology will have to be lighthearted and intelligent. The machine easily masters the grim and the dumb.”