And still it moves. the words of Galileo, murmured when the tortures of the Inquisition had driven him to recant the Truth he knew, apply in a new way to our world today. sometimes, in the knowledge of all that has been discovered, all that has been done to make life on the planet happier and more worthy, we may be tempted to settle down to enjoy our heritage. that would, indeed, be the betrayal of our trust.

These men and women of the past have given everything---comfort, time, treasure, peace of mind and body, life itself---that we might live as we do. the challenege to each one of us is to carry on their work for the sake of future generations.

The adventurous human mind must not falter. still must we question the old truths and work for the new ones. still must we risk scorn, cynicism, neglect, loneliness, poverty, persecution, if need be. we must shut our ears to easy voice which tells us that human nature will never alter as an exucse for doing nothing to make life more worthy.

Thus will the course of the history of mankind go onward, and the world we know move into a new splendour for those who are yet to be.

Questions:
1) What made Galileo recant the Truth he knew?
2) What is the heritage being alluded to in the first paragraph?
3)what does the 'betrayal of our trust' imply
4) Why do we need to question the old truths and work for the new ones?
Explain the words or expressions as highlighted/underlined in the passage.