At which moment love expresses at it best

any candid moment is the best. The expression of love and feelings work best when not planned.

There i no time or any articular situation for expressing love, you dont even need to use words. Just a glance is enough to do so..Many a times  much more love and care gets shared through ones eyes. 

Be happy in others happiness, be sad in others sadness, give a firm support when one is in need of it and enjoy the lightest moment of life with your loved ones are all examples of best moments to express love. This may be expressed through sharing some task, a loving glance, a pat or an embrace, wipe someone's tears, financial help, a sweet smile and through loads of best wishes.  

I'm of the opinion, the best moment to express liking or love,  may be to  your near and dear or your child is when one is in an exalted, or in a jubilant mood. It's only then the purpose is served.

It is best expressed when someone don't expect it from you.. That moment is the best moment to express your feelings.

Next of caring is love in any form of relation. We can share our problem to our friends they always support in our problem. There we see the love and care. 

I think Love in any form is expressed best when it has no hidden agenda behind it. Especially here I would like to give example of Parent and child. In today's fast pacing and result oriented life, unconditional love takes a backseat. Parents communicate with their children only when there is a hidden agenda-- some message to be given, some demands to be met or some teaching and preaching to happen. Conversations for the fun of having conversation is lost. But everyone will agree that the best experience you had with your loved ones was when there was no plan  and agenda for the meeting. It went natural and blissfully and love oozed out of you naturally

We may not explicitly show how we feel. Many a times it is the small things in which we express our true feelings.