Alain, If you're nervous about flying and you think more engines is safer then DON'T read this:
https://en.wikipedia.org/wiki/Eastern_Air_Lines_Flight_855
..where all three engines failed because of a "common mode" problem, namely a maintenance engineer's mistake.
But the silly thing is most of us drive to and from the airport, and you're MUCH more likely to get killed in a car accident. (Some friends with young children, when traveling without them, used to catch the same taxi to the airport then get on separate flights until they realised how pointless that was.)