Why are there no seats in the Gurudwara?

Answer 1

There are no seats in the Gurudwara because the believe that they should bring their mind low. They believe that you can only gain knowledge is your mind is low.

ANS#2:

Sitting on the floor is an expression of humility before the Guru. Furthermore, it also makes people feel equal and allows each person to choose a place suitable for him/her. While sitting on the floor, one can enjoy Kirtan with greater concentration than while sitting in chairs or on benches. It needs only a little training to be able to sit comfortably on the floor without being tired. A common problem with sitting on the floor is caused by skintight pants, which are not supposed to be worn in a Gurdwara, anyway. If a person has a medical problem and cannot sit without support for his back, there is no objection for his/her sitting by the wall of the Gurdwara. However, in practice it has been found that most of the people want to sit there for the sake of comfort and convenience, which needs to be discouraged. It is, therefore, suggested, that the people having a medical problem may be provided with a speaker in a separate room other than the Sangat hall. They may sit there with some support to overcome their medical handicap. In the Gurdwara we are supposed to be attentive and responsive as a student is supposed to be in his classroom while his teacher is teaching.