Travel in the modern world consists of a series of electronic notifications, an evening packing, a sad cat, a train ride and some time alone waiting. The process has become routine. Packing takes an hour. The train ride 40 minutes. The waiting time is peaceful, thinking time.

Leaving the cat, watching him realize what is happening as the duffle bag hits the floor, is the hardest part, the saddest part. And yet he too knows that this is our life; that commuting across the Pacific is how we pay for that apartment in San Francisco.

His face this morning, sitting on a Japanese-style stool looking out our window at the street, was perfect. He knows, he has known, that it was time for me to go again. But rather than watch me pack, rather than huddle on the bed, he sat at the window watching the pigeons on the telephone line outside. He looked out, calm, from the seat purchased specifically to give him this view.

These three months of peace, the down time between November’s wrap and March’s new start, have gone quickly. We’ve enjoyed lazy weekends, sleeping in and walking to the coffee shop or waking early and sitting by the window together. We’ve enjoyed long naps in the sun after beach ultimate on Sundays, confident that there was no better use of time. For three months we’ve spent most of our evenings together, sprawled on the sofa, happy to be home.

But the world is big, and adventures call. He and I are both curious animals, and underneath the sadness is a certainty. It’s the same certainty that brings us to the window at 4 am when there is yelling outside on the street, that wakes us both from the bed in our deepest sleeps. We must go see. We can not be content to sit and wonder what the racket means.

I must know how our products are made. He must watch the pigeons each morning. We are creatures of habit, true, but we are also creatures of adventure.

Out again into the world I go. Shanghai this week, and then Tokyo, Las Vegas, and Colorado.

The last one he and I will do together, a visit to the mountains and distant family. The thought of traveling together is exciting.

Watching him sit by the window, almost four years old now, his eyes on the wire and his body still, I know that he isn’t aware of our upcoming adventure. And given the choice, he might not like to leave his comfortable apartment, his daily routine. But like myself he will be happy once we’re elsewhere, able to look out new windows at new things.

Spring is here, I tell him, putting my bag on my shoulders. It’s time to go. Again.