The simple arithmetic triangle is full of surprises

Easy to construct, and always a chance of finding something never seen before

The secret of career happiness? Stop being ‘pointlessly busy’

Unthinkable: Four great philosophers have life advice that’s still relevant today

What’s it like to go mad? Meet the man who found out

Unthinkable: Psychosis gave Dutch linguist Wouter Kusters an insight into mental illness

Melatu-Uche Okorie: ‘In Ireland, you have to be mentally strong to survive’

The author and academic on art, self-expression, and overcoming obstacles through creativity

Can secular beliefs sustain us in our hour of need?

Carmel Heaney: Older generations uneasy because secularism does not offer same guidance as religion

Words to Live By (two metres apart) on World Poetry Day 2020

French Connections – Frank McNally on philosophy, the Mountains of Mourne, and women’s art

Can you be both a Christian and an unbeliever?

Unthinkable: Christianity’s tolerance of unbelief may be new atheism’s Achilles’ heel

Breda O’Brien: Smartphone addiction is a great danger we must resist

Technology giants wean us on their apps and glowing screens. It is time to take action

The Confessions of Frannie Langton: From the Caribbean to the courthouse

Book review: A captivating historical debut about a slave girl on trial for a double murder

Breda O’Brien: Mindfulness not the cure for all that ails us

Practice in danger of becoming another self-focused response that prevents us challenging skewed values

Pessimism might be more useful than we think – especially at Christmas

Laura Kennedy: Pascal’s work is a comfort because at this performative time of year

Will Twitter’s 280 characters cause ‘tweeter’s block’?

Goodbye short and sweet tweets, hello big, fat, unedited windbaggery

Irish rowers head for Boston for final pull at glory

Head of the Charles Regatta is one of rowing’s biggest events, with 11,000 competing