Meditation is valuable for all of humanity because it involves looking inward. People don't have to be religious to look inside themselves more carefully. It is constructive and worthwhile to analyze our emotions, including compassion and our sense of caring, so that we can become more calm and happy.
The rationale for loving others is the recognition of the simple fact that every living being has the same right to and the same desire for happiness, and not suffering, and the consideration that you as one individual are one life unit as compared with the mulititude of others in their ceaseless quest for happiness.
Within the framework of the buddhist path, reflecting on suffering has tremendous importance because -realizing the nature of suffering, you will develop greater resolve to put an end to the causes of suffering and the unwholesome deeds which lead to suffering. And it will increase your enthusiasm for engaging in the wholesome actions and deeds which lead to happiness and joy.
On the philosophical level, both buddhism and modern science share a deep suspicion of any notion of absolutes, whether conceptualize as a transcendent being, as an eternal, unchanging principle such as soul, or as a fundamental substratum of reality. ... In the buddhist investigation of reality, at least in principle, empirical evidence should triumph over scriptural authority, no matter how deeply venerated a scripture may be.