Understanding what love is - we probably learn part of this through experience, and part through something that is there inate already, perhaps instinct (parent loving a child for example - though sometimes this might not be there). The loving & caring thing can depend on each person individually - regardless of their beliefs (IMO).
Regarding God - God being within each of us. Christians know this (1 John 4:7, 1 John 4:8) - but some might think it only applies to Christians - when really it applies to the whole lot of us (IMO)