In my Talmud class, which has been running each Thursday morning for almost 40 years, we have reached the word echad, ‘one’ (Berachot 13a). It’s such a simple word that every child knows it. Yet it’s so demanding that the world can’t understand it.

Say the word ‘one’ very carefully, insists the Talmud. Say it not just with kavvanah, attention, but with kavvanat halev, concentration of the heart. Draw out the letters for long enough to acknowledge that God is above, below, and everywhere in all directions. For ‘Hear, O Israel, our God…is one’ is Judaism’s creed, its soul, and the spirit of all life.

This is not a mere concept, a mathematical proposition like ‘God isn’t two.’ It’s how we’re called upon to live in this fractured and brutal, yet wondrous and beautiful, world. It means what the mystics taught, that one vital spirit flows through all life, and that all life, in its manifold manifestations, is bound in one sacred kinship.

This is not to deny the cruel realities around us. On Sunday, leaders of the Congolese community in exile poured out their hearts around my dinner table: ‘Rwanda’s invaded, taken Goma. Our relatives are slaughtered, my nephew was killed last week. We need help!’ What can one do? We prayed, for each other’s anguish, for Israel, the hostages, the Middle East, the DRC.

Oneness, togetherness, seems a feeble notion, a mere fiction, set against such violence. Nevertheless, it remains the most comprehensive truth we know. This week I witnessed three glimpses what that might mean oneness, three moments of hope.

The first was the signing of the Drumlanrig Accords between leaders of the Jewish and Muslim communities of this country. The outcome of long and detailed debate, the accords open by affirming that we ‘share a profound spiritual heritage…  rooted in monotheism, the sanctity of life and a commitment to justice.’ They conclude with the commitment to ‘work tirelessly to enable future generations to inherit our legacy of friendship, mutual respect, and solidarity.’ No doubt, some will mock this. It’s far from the reality on our streets. Yet it’s nothing more or less than what we proclaim in our creed, that God is one.

Then came Tu Bishevat, the New Year of the Trees. Back around my table, we spoke of our love of trees, of the tree of life at the centre not just of Eden, but of the gardens of our childhood: ‘It’s still there, that oak I climbed as a little girl.’ ‘I’ve had that handkerchief tree planted, not in my garden but in the square, so that the village children can enjoy it for generations after I’m gone.’ Trees and nature are not wholly other; we need them, materially, mentally and spiritually. We belong together, in the vital oneness of life; we cannot survive apart.

Last but not least, I spoke with a close relative of a hostage in Gaza. I didn’t ask permission, so shan’t share their name. ‘I’m not made for hate,’ they said. ‘I do feel it sometimes,’ they acknowledged, ‘I sense it inside me. But I don’t follow it, because we’re here to do hesed, to live by compassion.’ These humbling words fill me with the deepest respect.

‘Say ‘God is one’ slowly, insists the Talmud: meditate on God’s oneness above, below, and in all directions.’ Saying the words is important. But the real challenge is to live by them in this unjust, violent world.

That’s the task to which we are called by our faiths to be faithful.