But this can be done without one moment's worry on the part of a solitary human being, and care is as different from worry as gold is from dross, coal from ashes.

By all means, take due precautions; study to avoid the possibility of accidents, but do not give worry a place in your mind for a moment.
A twin brother to this health-worrier is the nervous type, who is sure that every dog loose on the streets is going to bite; every horse driven behind is surely going to run away; every chauffeur is either reckless, drunk, or sure to run into a telegraph pole, have a collision with another car, overturn his car at the corner, or run down the crossing pedestrian; every loitering person is a tramp, who is a burglar in disguise; every stranger is an enemy, or at least must be regarded with suspicion.

Such worriers always seem to prefer to look on the dark side of the unknown rather than on the bright side.
"Think no evil!" is good philosophy to apply to everything, as well as genuine religion--when put into practice.

The world is in the control of the Powers of Good, and these seek our good, not our disaster.

Have faith in the goodness of the powers that be, and work and live to help make your faith true.