Below are some quotes by some very bright people about liberalism.

Liberalism is, I think, resurgent. One reason is that more and more
people are so painfully aware of the alternative. The modern
conservative is engaged in one of man's oldest exercises in moral
philosophy; that is, the search for a superior moral justification for
selfishness. John Kenneth Galbraith

As mankind becomes more liberal, they will be more apt to allow that
all those who conduct themselves as worthy members of the community
are equally entitled to the protections of civil government. I hope
ever to see America among the foremost nations of justice and
liberality. George Washington

Of all the varieties of virtues, liberalism is the most beloved.
Aristotle

Liberalism is trust of the people, tempered by prudence; conservatism,
distrust of the people, tempered by fear. William Gladstone

Government is a contrivance of human wisdom to provide for human
wants. People have the right to expect that these wants will be
provided for by this wisdom. Jimmy Carter

Liberalism is the supreme form of generosity; it is the right by which
the majority concedes to minorities and hence it is the noblest cry
that has ever resounded on this planet. Jose Ortega y Gasset

A liberal is a man or a woman or a child who looks forward to a better
day, a more tranquil night, and a bright, infinite future. Leonard
Bernstein

Conservatives are not necessarily stupid, but most stupid people are
conservatives. John Stuart Mill