
The word chord, defined as a combination of single notes played together is from from the French, meaning agreement or accord; separate vibrations playing simultaneously, harmoniously.
One's invisible spirit or consciousness also over time experiences a scale of high and low notes in the ups and downs in daily life on earth. But what if there was a secret chord, a combination of notes one might play to ease life's discordant trials and reveal a harmonious higher order of existence?
Values like gratitude, forgiveness, tolerance, mercy, and a conviction that a Higher Power benevolently accompanies, counsels and guides towards one's highest good throughout, are notes of a divine chord or an accord with the Supreme - if one has interest in pursuing such a dialog.
One always has the free will of choice in deciding how to react to whatever life sends one's way; reacting with surrender and praise of wisdom, Source/God, with a "Hallelujah" is just one of many.
When one can praise the Supreme in all circumstances, one's spiritual heart strengthens and spiritual communications from the Lord in the heart / Holy Spirit are gradually revealed, accordingly.

Srimad Bhagavam 10.14.8
tat te ’nukampam su-samiksamano
bhuñjana evatma-krtam vipakam
hrd-vag-vapurbhir vidadhan namas te
jiveta yo mukti-pade sa daya-bhak
Translation:
My dear Lord, one who earnestly waits for You to bestow Your causeless mercy upon him, all the while patiently suffering the reactions of his past misdeeds and offering You respectful obeisances with his heart, words and body, is surely eligible for liberation, for it has become his rightful claim.
Hallelujah!