On the mental side the case is no different

On the mental side the case is no different. Our thinking is as
characteristic as our physical acts. We may form the habit of thinking
things out logically, or of jumping to conclusions; of thinking
critically and independently, or of taking things unquestioningly on the
authority of others. We may form the habit of carefully reading good,
sensible books, or of skimming sentimental and trashy ones; of choosing
elevating, ennobling companions, or the opposite; of being a good
conversationalist and doing our part in a social group, or of being a
drag on the conversation, and needing to be 'entertained.' We may form
the habit of observing the things about us and enjoying the beautiful in
our environment, or of failing to observe or to enjoy. We may form the
habit of obeying the voice of conscience or of weakly yielding to
temptation without a struggle; of taking a reverent attitude of prayer
in our devotions, or of merely saying our prayers.

The whole of duty towards others is not however comprehended in

justice
The whole of duty towards others is not however comprehended in
justice. Conscience complains, if we have only not done injustice to
one in suffering. There is a new class of duties--_consolation,
charity, sacrifice_--to which indeed correspond no rights, and which
therefore are not so obligatory as justice, but which cannot be said
not to be obligatory. From their nature, they cannot be reduced to an
exact formula; their beauty lies in liberty. But in charity, he adds,
there is also a danger, from its effacing, to a certain extent, the
moral personality of the object of it. In acting upon others, we risk
interfering with their natural rights; charity is therefore to be
proportioned to the liberty and reason of the person benefited, and is
never to be made the means of usurping power over another.

The sweeping nature of this deduction may from its very

comprehensiveness fail to carry conviction to the reader
The sweeping nature of this deduction may from its very
comprehensiveness fail to carry conviction to the reader. But
concrete illustrations of the value which scientific research
may add to our environment are not far to seek. They are
afforded in abundance by the dramatic achievements of the past
century of human progress, in which science has begun painfully
and haltingly to creep into its true place and achieve its true
function.